Tag: arachnids

I Can Put My Leg Back On You Can’t: How Spiders Regrow Limbs

The reference, for those of you lucky enough not to recognize it.

Recently I found a tiny four-legged running crab spider (family Philodromidae) in Trinity-Bellwoods and brought it home to keep temporarily until it grew its legs back. It was so small that I could keep it in a 45 mL plastic cup with a tiny chip of bark. I fed it sugar syrup on the end of a Q-tip, and then (as it was too small and terrified for the flightless fruit flies I raise for Sabella, my pet black widow) I made it a (disgusting) fruit fly-and-syrup mush to drink. It soon molted and grew back three legs, and was then big enough to catch fruit flies. I think it grew back the last leg its next molt, but perhaps dropped it again when it nearly escaped one night as I tried to feed it—a sign, to me, that it was time to release it. I made sure it ate again, then set it free at the spot in the park that I found it. It immediately caught a small green plant bug and raced off, lightning-fast and good as new.

I chronicled the whole thing on Mastodon, and received many replies from people who had no idea spiders could regrow legs! So here is a proper post about the phenomenon. Continue reading I Can Put My Leg Back On You Can’t: How Spiders Regrow Limbs

Recent arachnid lifers & rarities

It recently occurred to me that I first got into spiders around 2013 or 2014, which means that, unbelievably, I have been spidering for ten years. I mostly go to the same sites and recognize most of the spiders and mites I see, so I have gotten more interested in observing their behaviour rather than trying to identify them. But every now and then I do come across some that are totally new to me, or ones that I only see rarely. Here’s some of the “lifers” and rarities I’ve come across this year so far, with links to the corresponding iNaturalist observations.

Continue reading Recent arachnid lifers & rarities

Field journal: Spiders of the Oculus

Yesterday afternoon, after the rain stopped, I made a quick trip to the Oculus—the long-abandoned space-age modernist pavilion near the foot of the Humber Trail. And within a minute’s walk along the trail in either direction, I found more spider diversity than I ever find in my usual sites! Continue reading Field journal: Spiders of the Oculus

Know Your Little Red Mites: A Guide

Infographic with illustrations and descriptions of four common red-coloured mites
The infographic version. Click for a full-sized image.

To the casual observer, many mites are just mysterious little red dots. Gardeners and farmers will be familiar with the spider mite family, Tetranychidae. These mites are plant-eaters, and many are major agricultural pests worldwide.

But there are so many other kinds of mites—more than you know. More than I know! More than even acarologists (mite scientists) know. They have described about 50,000 species, but they think there are probably at least a million in total.1 If you take a closer look at the little red dots running around, you can find many different kinds, occupying many different ecological niches, all unique and delightful to watch. Continue reading Know Your Little Red Mites: A Guide

Field journal: First spiders of spring in Trinity-Bellwoods

This winter I have tried to get into the habit of getting a coffee and a pastry at the White Squirrel and going for walks around Trinity-Bellwoods, just to get out of the house. There haven’t been bugs, but there are sometimes Fancy Birds: finches (house or purple, I’m not sure), woodpeckers, and once a Cooper’s hawk. Today it was quite nice and to my surprise there were flies and midges in the air, red velvet mites crawling in the soil, and the first spiders out and about! Continue reading Field journal: First spiders of spring in Trinity-Bellwoods

Update: Pinecone Spiders

Summer spidering season is well underway, and I’m no longer turning over pinecones in search of spiders. But I just stumbled across this 2016 blog post by Rod Crawford (of Seattle, WA’s Burke Museum) about Laurel Ramseyer’s research! Since 2008 she’s been sampling fallen pinecones for spiders—apparently a niche unexplored till now. This turned up the first record of the jumping spider Pseudoeuophrys lanigera in North America and has also proved useful for tracking the range of the crab spider Ozyptila praticola.

In 2015, Ramseyer and Crawford wrote a paper summarizing their findings about the pinecone-dwelling spiders of Washington State. A lot of mesh-web weavers (family Dictynidae), ground spiders (Gnaphosidae), sheet-web weavers and dwarf spiders (Linyphiidae), and cobweb spiders (Theridiidae). A lot different from all the running crab spiders (Philodromus) in my lakeside pinecones. They also mention finding a lot of Euryopis, a spider I’ve failed to find at all in my area despite seeing their distinctive tufty egg sacs all the time. Maybe that’s where I should be looking.

Time to do some reading and up my pinecone game…

Arachnews: May 3, 2021

Well, I’m back. Much like a tarantula, I felt the need to seal myself into a burrow for several months on end for no particular reason. This isn’t even close to covering the backlog. But here is a sprinkling of arachnid-related art, news, and science from the last several months, including:

  • VR spiderweb sound art
  • slingshot spiders and harvesters on treadmills
  • new species with nerdy and musical names
  • upcoming arachnology conferences
  • and more…

Read more on Medium.

Field journal: Sumo mites

I just love red velvet mites—their soft, plush coats, their Shar-Pei wrinkles, that eye-popping red. Until now, all I’d really seen of their behaviour was eating midges, aphids, and other small insects. But recently I saw something quite astonishing for the first time. Continue reading Field journal: Sumo mites

Field journal: More spiders in pinecones

A nice routine I have fallen into over the past several months is spider-hunting while catching up on the podcast The History of Philosophy Without Any Gaps. And so

“Like Rodney Dangerfield, obsessive collectors get no respect. The word ‘trainspotter’, which refers to a railway enthusiast, is, in British English, synonymous with ‘loser’, and there is indeed something slightly tragic about someone who spends all their free time looking for things the rest of us find pointless.”

Me:

Me: ಠ___ಠ

Aaaanyway, here’s a bunch of spiders and whatnot I’ve found on recent winter excursions. Continue reading Field journal: More spiders in pinecones